11664519457 has 4 divisors (see below), whose sum is σ = 11805055920. Its totient is φ = 11523982996.

The previous prime is 11664519409. The next prime is 11664519467. The reversal of 11664519457 is 75491546611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11664519457 - 2¹¹ = 11664517409 is a prime.

It is a super-2 number, since 2×11664519457² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11664519457.

It is not an unprimeable number, because it can be changed into a prime (11664519467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70268107 + ... + 70268272.

It is an arithmetic number, because the mean of its divisors is an integer number (2951263980).

Almost surely, 2^11664519457 is an apocalyptic number.

It is an amenable number.

11664519457 is a deficient number, since it is larger than the sum of its proper divisors (140536463).

11664519457 is an equidigital number, since it uses as much as digits as its factorization.

11664519457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140536462.

The product of its digits is 907200, while the sum is 49.

The spelling of 11664519457 in words is "eleven billion, six hundred sixty-four million, five hundred nineteen thousand, four hundred fifty-seven".